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FileContext.cs

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/*----------------------------------------------------------

This Source Code Form is subject to the terms of the

Mozilla Public License, v.2.0. If a copy of the MPL

was not distributed with this file, You can obtain one

at http://mozilla.org/MPL/2.0/.

----------------------------------------------------------*/

using System;

using System.IO;

using OneScript.Contexts;

using ScriptEngine.Machine.Contexts;

namespace OneScript.StandardLibrary

{

[ContextClass("Файл","File")]

public class FileContext : AutoContext<FileContext>

{

private readonly string _givenName;

private string _name;

private string _baseName;

private string _fullName;

private string _path;

private string _extension;

public FileContext(string name)

{

// Strip null characters that can be added by Windows WebDAV client

// to maintain compatibility with 1.x behavior

name = PathHelper.StripNullCharacters(name);

if (String.IsNullOrWhiteSpace(name))

{

_name = "";

_baseName = "";

_fullName = "";

_path = "";

_extension = "";

}

_givenName = name;

}

private string LazyField(ref string value, Func<string, string> algo)

{

if (value == null)

value = algo(_givenName);

return value;

}

[ContextProperty("Имя","Name")]

public string Name

{

get

{

return LazyField(ref _name, GetFileNameV8Compatible);

}

}

private string GetFileNameV8Compatible(string arg)

{

return System.IO.Path.GetFileName(arg.TrimEnd(System.IO.Path.DirectorySeparatorChar, System.IO.Path.AltDirectorySeparatorChar));

}

[ContextProperty("ИмяБезРасширения", "BaseName")]

public string BaseName

{

get

{

return LazyField(ref _baseName, System.IO.Path.GetFileNameWithoutExtension);

}

}

[ContextProperty("ПолноеИмя", "FullName")]

public string FullName

{

get

{

return LazyField(ref _fullName, System.IO.Path.GetFullPath);

}

}

[ContextProperty("Путь", "Path")]

public string Path

{

get

{

return LazyField(ref _path, GetPathWithEndingDelimiter);

}

}

private string GetPathWithEndingDelimiter(string src)

{

src = src.Trim ();

if (src.Length == 1 && src[0] == System.IO.Path.DirectorySeparatorChar)

return src; // корневой каталог

var path = System.IO.Path.GetDirectoryName(src.TrimEnd(System.IO.Path.DirectorySeparatorChar, System.IO.Path.AltDirectorySeparatorChar));

if (path == null)

return src; // корневой каталог

if (path.Length > 0 && path[path.Length - 1] != System.IO.Path.DirectorySeparatorChar)

path += System.IO.Path.DirectorySeparatorChar;

return path;

}

[ContextProperty("Расширение", "Extension")]

public string Extension

{

get

{

return LazyField(ref _extension, System.IO.Path.GetExtension);

}

}

[DeprecatedName("Exist")]

[ContextMethod("Существует","Exists")]

public bool Exists()

{

if (_givenName == String.Empty)

return false;

try

{

File.GetAttributes(FullName);

return true;

}

catch (FileNotFoundException) { }

catch (DirectoryNotFoundException) { }

catch (ArgumentException) { }

catch (NotSupportedException) { }

catch (PathTooLongException) { }

catch (UnauthorizedAccessException) { }

catch (IOException) { }

return false;

}

[ContextMethod("Размер", "Size")]

public long Size()

{

return new FileInfo(FullName).Length;

}

[ContextMethod("ПолучитьНевидимость", "GetHidden")]

public bool GetHidden()

{

var attr = File.GetAttributes(FullName);

return attr.HasFlag(System.IO.FileAttributes.Hidden);

}

[ContextMethod("ПолучитьТолькоЧтение", "GetReadOnly")]

public bool GetReadOnly()

{

var attr = File.GetAttributes(FullName);

return attr.HasFlag(System.IO.FileAttributes.ReadOnly);

}

[ContextMethod("ПолучитьВремяИзменения", "GetModificationTime")]

public DateTime GetModificationTime()

{

return File.GetLastWriteTime(FullName);

}

[ContextMethod("ПолучитьВремяСоздания", "GetCreationTime")]

public DateTime GetCreationTime()

{

return File.GetCreationTime(FullName);

}

[ContextMethod("УстановитьНевидимость", "SetHidden")]

public void SetHidden(bool value)

{

FileSystemInfo entry = new FileInfo(FullName);

if(value)

entry.Attributes |= System.IO.FileAttributes.Hidden;

else

entry.Attributes &= ~System.IO.FileAttributes.Hidden;

}

[ContextMethod("УстановитьТолькоЧтение", "SetReadOnly")]

public void SetReadOnly(bool value)

{

FileSystemInfo entry = new FileInfo(FullName);

if (value)

entry.Attributes |= System.IO.FileAttributes.ReadOnly;

else

entry.Attributes &= ~System.IO.FileAttributes.ReadOnly;

}

[ContextMethod("УстановитьВремяИзменения", "SetModificationTime")]

public void SetModificationTime(DateTime dateTime)

{

FileSystemInfo entry = new FileInfo(FullName);

entry.LastWriteTime = dateTime;

}

[ContextMethod("ЭтоКаталог", "IsDirectory")]

public bool IsDirectory()

{

var attr = File.GetAttributes(FullName);

return attr.HasFlag(FileAttributes.Directory);

}

[ContextMethod("ЭтоФайл", "IsFile")]

public bool IsFile()

{

var attr = File.GetAttributes(FullName);

return !attr.HasFlag(FileAttributes.Directory);

}

public FileAttributes GetAttributes()

{

return File.GetAttributes(FullName);

}

[ScriptConstructor(Name = "По имени файла")]

public static FileContext Constructor(string name)

{

return new FileContext(name);

}

}

}